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• I need some MySQL lookup table advice

  - by Gary Beam

  I have a MySQL database with about 200 tables. 50 of these are small 2-field 'id-data' lookup tables. Several of these DB's are hosted on a shared server. I have been informed that I need to reduce the total number of tables in the shared hosting environment because of performance issues relating to too many tables. My question is: Could/Should the 50 2-Field lookup tables be combined into a single 3-field table with 'id-field_name-data' Fields? Even if this can be done, I will have a lot of work to do on the PHP user application. My other choice is moving the DB's to a dedicated server at much higher hosting cost. I don't believe my 200 table DB's are actually causing any performance issues on this shared hosting server, at least not from the user application standpoint. There are never more than 10 of these tables joined in any single query; although I have seen some very-slow queries generated by phpmyadmin on these DB's.

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• How did we get saddled with the (hierarchical) filesystem as the basic data structure?

  - by user1936

  I'm self-taught and I don't have a CS degree. The more I've been learning about data structure, the more I wonder, in this day and age, how are we still saddled with the filesystem, with directories and files, as the basic data storage structure on the OS? I understand the simplicity of it, but it seems nowadays that there could be more options available natively. As far as I'm aware, the only project to improve the basic functionality of the filesystem was ReiserFS, where you could tell what line of a file was changed by whom, and when. For instance, if I could have native tagging for files, where I could tag images, diagrams, word-processing documents, an entire code repository, all as belonging to a single project, that would really be helpful to me. Since I'm stuck in the filesystem paradigm, I know that I could put all those into a single folder/directory, but what if they already exist in disparate directories, and they need to stay there? I know there are programs out there that can do this, but why aren't they on the filesystem? Something that would be nice to have is some kind of relational feature in the filesystem, like you get with RDBMSes. I understand that that was supposed to be part of Vista/7, but that fell off the feature list too. Sure, any program can store a binary file and have any data structure it wants in it, by why couldn't the OS offer more complex ways of storing data, beyond the simple heirarchy of the filesystem?

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• Setting up a Google Analytics Campaign

  - by Ashfame

  I will be doing a bunch of things to give one of my projects (main app) a big initial push for which I will be building a few small Facebook apps which will help in promoting the main apps. Traffic from these apps need to be tracked individually. My main app will be posting on the walls when the user needs to be notified. Traffic from these posts need to be tracked. Traffic from emails sent by the main app need to be tracked, like different types of email. I need to track all of these & possibly a couple of more but I need to be sure that I build my campaign URLs correctly as I won't get another chance to fix it. Correct me where I am wrong: Campaign Name: Launch Campaign Medium: Email Campaign Source: Type1 or Type2 (I can break it down for different types of email, right?) For apps: Campaign Name: Launch Campaign Medium: Apps Campaign Source: App1 or App2 (I can break it down here for different apps, right?) What if I want to track two different links within a single email or a single app? Any way of tracking them individually too but still keeping to track them as one because tracking them as one makes more sense for me. Campaign Term & Campaign content is irrelevant in my case, or I can/should use them for something? And I will also be tracking traffic of different apps. Should I do more? Let me know if my scenario wasn't clear enough & I need to explain more.

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• Access device with local ip over internet

  - by Joe Perrin

  I apologize up front if this is the wrong place to post this question. It seemed like the best fit. I have a device which is connected to my local network which has an IP of 192.168.1.10 from my router. Additionally I use a Windows 7 machine that runs some software called DirectUpdate which allows me to resolve the local IP of the Windows 7 machine (192.168.1.5) to be accessible to the internet via my domain (example.com) - Basic dynamic DNS updating. I'd like to access the device from example.com. I am unsure how to do this as I don't have any way to install DirectUpdate (or any software) on the device to make the device available to the internet. Any insight here would be appreciated. Thank you.

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• Is white the best base color to start with when planning to shade sprites within Unity?

  - by SpartanDonut

  I'm looking into prototyping a game in Unity which will consist of solid square sprites / tiles. I figure I can represent different types of objects with different colors for each of the tiles in the game. I figure that I can import a single square sprite and shade it appropriately in Unity as opposed to imported squares of many different colors. My experience with adjusting the hue and saturation within Photoshop shows that white is not an easy color to change as things that are white often stay white. My testing in Unity shows that I can change the "color" of a sprite to anything other than white and the sprite is seemingly shaded appropriately, despite what I would have thought given my Photoshop experience. Since white objects do seem to take on the appropriate color shading when changed within Unity my gut tells me that this is the best base color to begin with, meaning that I can import a single white square sprite and simply adjust the color to represent different objects and object states. Is a white sprite actually the best color sprite to begin with and why does something like this work in Unity as opposed to adjusting the hue and saturation within Photoshop?

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• Installing VMWare Tools in Windows Server 2008 fails system startup

  - by Hoghweed

  I recently created a vmware virtual machine with windows server 2008 enterprise as Guest. My host is Ubuntu 10.04 on my Lenovo laptop. I fall into a big trouble which makes my created VM unusable after I've installed VMWare Tools. After installing tools I'm able to run the system only in safe mode. After some event manager analysis I found the issue is with drivers installed by vnmware tools. Any one has got the same issue? Is there any good practice for doing that? The configuration of vm machine is the following CPU : 1 RAM : 1020 HD : 40GB Splitted files, SCSI CD : IDE Thanks in advance

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• How do I boot Windows 8 into Safe Mode?

  - by Earlz

  I have Windows 8 Enterprise x64. It's installed a virtual machine. After trying to update VMWare's guest extension it black screened. After resetting it, now the virtual machine won't boot. It just says "automatic repair couldn't repair your PC" Everything I do ends with an error or it coming back to this screen. If I go to Troubleshoot Advanced Options Start up settings and then go to Safe Mode, all it will do is say "preparing automatic repair" and then "diagnosing your PC" and then will come straight back to the "automatic repair couldn't repair your PC" screen. It's as if it doesn't even attempt to go into safe made. Is there anything else I can do before I reformat?

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• Is there a way to define a rule on a bridge that will return reply for ARP request

  - by user1495181

  client (IP = 1.1.1.1) - bridge (brctl) - server (IP = 2.2.2.2) (all machine are Ubuntu). The client block arp request. (there are multiple clients ) I need to define a rule on the bridge machine that will return the client MAC when it get ARP request for IP 1.1.1.1. I see that in ebtables there is an arpreply option , but i didnt manage to find an example to define the arpreply by given arp request ip. ebtables -t nat -A PREROUTING -p arp -j arpreply --arpreply-mac 00:09:5B:91:56:08 Can you please adcive

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• Blank screen after grub menu

  - by Tim

  I just rebooted an Ubuntu Server 10.04. After choosing boot options in the grub menu, though, it just displays a black screen with the blinking white underscore in the upper-left corner. The machine has had (hardware) trouble with networking before, but the problem remains after 10 minutes, so I don't think it's the problem now. Booting into recovery mode or using earlier kernels yields the same problem. This also happens if I boot from another hard-drive. I haven't yet tried to boot from CD as the machine lacks a CD reader. How should I diagnose the problem? Update: My boot options are: recordfail insmod ext2 set root='(hd0,1)' search --no-floppy --fs-uuid --set 567[redacted] linux /boot/vmlinuz-2.6.32-29-generic root=UUID=567[redacted] ro quiet splash initrd /boot/initrd.img-2.6.32-29-generic Update: Also, I cannot access the virtual terminals (ctrl+alt+Fn).

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• Is there a suitable chain for iptables when eth is in Promisc mode?

  - by user1495181

  I have a fron-end machine. Machine have2 eth cards. I want to use netfilter queue to do some checks on the packets. I set eth like this: ifconfig eth0 0.0.0.0 promisc up ifconfig eth1 0.0.0.0 promisc up I want to have an iptable rule like this(only example): iptables -A INPUT -i eth0 -j LOG --log-prefix " eth0 packet " but the packet is no passed through the iptables ,because it dosnt target to this MAC. Promisc mode didnt help. I saw that there is a way to add iptables chain for PROMISC, but need compilation... Is there any simplier way to have iptables rule when packet is not target to this eth. Currently i bypass this by creating a bridge between 2 eth and put rule on the FORWARD, but i done want to create bridge.

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• Combine OS partion with data partition on NAS4Free/FreeNAS

  - by Pak

  I recently built a NAS4Free (formerly FreeNAS) machine using a 256MB (yes, MB) USB drive for the OS. When I did the original install, I had the bright idea of making the OS partition just big enough for the OS and a then creating a second partition using the remainder of the drive to store stuff pertaining to the OS. I never really found a use for the data partition and I ended up running out of space on the OS partition, so now I'd like to combine the partitions into a single partition. Is this something that is possible to do while everything is up and running? If it comes down to it, I can take down the machine and do a fresh install of the OS using the entire space of the USB drive, but I'd like to use this as an opportunity to better familiarize myself with FreeBSD/UNIX type systems. If this is possible, will it interfere with the NAS4Free things? The data partition shows up in the web interface under the disks section. If I end up manually changing the partitions, I'd be concerned with NAS4Free getting confused by the missing partition.

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• Making audio CDs en mass - Linux based solutions?

  - by The Journeyman geek

  My mom's sings and gives away cds to people. Invariably it falls to me to have to burn cds for her, and burning 50-100 cds on a single drive is a pain. I DO have a handful of cd burners and a slightly geriatric old PIII 450. This is what i want to be able to do - either point an application at a folder of WAV or MP3s, say how many copies i need on CLI (since then i can SSH into the system and use it headless) feed 2 or more CD burners cds until its done, OR pop in a single CD into a master drive and have its contents duplicated to 2 or more burners. I'd rather have it running on linux, be command line based, and be as little work as possible - almost automatic short of telling it how many copies i want would be ideal. I'm sure i'll have people wondering about legality - My mom sings her own music, and its classical, and older than copyright law, so, that's a non issue. I just want a way to make this chore a little easier, short of telling my mom to do it herself.

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• Oracle Day 2012

  - by Mark Hesse

  Normal.dotm 0 0 1 133 760 Sun Microsystems 6 1 933 12.0 0 false 18 pt 18 pt 0 0 false false false /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; font-family:"Times New Roman"; mso-ascii-font-family:Cambria; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Cambria; mso-hansi-theme-font:minor-latin;} As a keynote speaker at this year’s Oracle Day 2012, “Your Vision, Engineered” I had the honor and pleasure of speaking to a crowd of about 150 attendees about our recently released, fourth generation Exadata X3 In-Memory Machine in a presentation entitled “Oracle Exadata X3 - Transforming Data Management”. The general theme of the thirty-minute talk was how to improve performance, lower costs, and build the foundation for your cloud service platform using Exadata. Since its introduction in 2008, I’ve watched first-hand as Exadata has evolved from a data warehouse-only system to an OLTP and DW in-memory database machine capable of storing hundreds of terabytes of compressed user data in flash and main memory.  Many of my Exadata customers are now purchasing additional systems as they continue to standardize Oracle 11g deployments on the best database platform available.

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• Grant user from one domain permissions to shared folder in another domain

  - by w128

  I have two computers set up like this: \\myPC (local Windows 7 SP1 machine); it is in domain1; \\remotePC (Win Server 2008 with SQL Server - a HyperV virtual machine); it is in domain2. In domain2 active directory, I have a user account RemoteAccount. I would like to give this account full permissions to a shared folder located on \\myPC, i.e. folder \\myPC\SharedFolder. The problem is, when I right-click the folder and go to sharing permissions, I can't add permissions for the domain2\RemoteAccount user, because this user cannot be found - I can only see domain1 users. When I click 'Locations' in "Select users, computers, service accounts, or groups" dialog, I only see domain1. Is there a way to do this?

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• Will the Driver Support for Intel HD Graphics be Improved in 12.10?

  - by Hiranya

  I recently installed Ubuntu 12.04 on a HP Pavilion dv4 laptop. This is a core i7 machine with Intel HD graphics and also a separate nVidia VGA card. I had a lot of issues getting Ubuntu 12.04 working on this system. First there were issues booting up the live CD for installation. I worked around that by using the 'nomodeset' option. Then I continued to have similar issues after installation has completed. So I had to permanently add the nomodeset option to my GRUB boot configuration. At the moment I have a working installation but there are many issues: Ubuntu GUI is a bit flaky at times. The mouse pointer goes on and off when hovering over certain icons. Certain things doesn't get rendered properly on the screen. I can't access any of the tty consoles. Hitting Ctrl+Alt+F[1-6] gives me a blank screen. And once that happens I can't even come back to the UI by hitting Ctrl+Alt+F7. I've realized that tty consoles are actually working. I just can't see the text. If I enter a command like 'sudo reboot' into the empty screen the machine reboots. Can't get external displays (monitors, projectors etc) working. But I think this is probably because the VGA out is wired to the nVidia card which is not being used by Linux. colord program crashes every now and then triggering a popup message. So my main question is, will the support for Intel HD graphics be improved in the next release? Or will I have to keep using the nomodeset option in the new release too? Also I appreciate if anybody can shed some light on any of the issues listed above. Thanks in advance.

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• X11 forwarding from one server to other

  - by n3oblit7

  I have a setup where I need to forward X11 from my local machine (laptop) to a Virtual machine. The server hosting this VM cannot be reached directly from my laptop. I need to first login to a gateway and from this gateway, I can access the VM. How can I forward X11 from my laptop to this VM? I have tried following but these do not work: [laptop # ] ssh -X [gateway] [gateway # ] ssh -X [VM] [laptop # ] ssh -tX [gateway] ssh -X [VM] I could forward X11 only till the gateway. (DISPLAY variable gets set on gateway)

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• Qemu in an ssh session or the quest for the nographic option ?

  - by LB

  Hi, I ssh to a machine and I would like to start a qemu session inside this ssh session. I thought that the nographic option would do the trick. -nographic Normally, QEMU uses SDL to display the VGA output. With this option, you can totally disable graphical output so that QEMU is a simple command line application. The emulated serial port is redirected on the console. Therefore, you can still use QEMU to debug a Linux kernel with a serial console. but unfortunately, i don't see any output. The command line that i'm using once i've sshed to my machine is : qemu-system-x86_64 -hda debian.img -nographic any idea ? thanks.

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• How small can/should I make my partitions?

  - by Pureferret

  My machine is currently split into 3 user partitions (plus however many Windows and Linux have decided to slyly create) Which are C: Windows 7, D: Data, and E(?): Ubuntu. I'm considering wiping my Windows 7 Install (stupid Skyrim not installing) and restructuring the way my machine operates. I want the partitions for the Windows and Linux install to be as small as possible while still able to function well, and be able to install games on my Windows C: drive. I then want to link from both Win7 and Linux drives to the middle D drive so that the in built My Documents (and etc on windows) folder and my Home folder (linux) share a common location, rather than my current situation which is 3 separate file locations. Something like this: I have 1 TB to play with and I want to know the 'best' sizes to make these partitions when I reinstall Windows (which I need to do anyway) and re-jig everything.

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• Oracle Exadata?????????? ??1

  - by takashi.hitomi

  2009?7?~2010?5????Oracle Exadata???????????????? 2010?4?15? ???? ???????????? ? ??????Exadata V2??????????????????????? 2010?4?13? ???? ??????????? ? ?????????????????????????? 2010?4?6? ?????·???????·??????? ? T???????????????????????????????????? 2010?3?1? ?????? ????? ?????????????????????????????????????? 2010?2?2? ???? ????????? ? ??????????????Intel???????????????Sun Oracle Database Machine??????? 2010?1?26? ???? ????(????·???) ? ?Oracle Exadata??????????·??????????????????????? 2009?7?14? ?????????? ? ???????????HP Oracle Database Machine????

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• loss of sound in ubuntu 12.04

  - by Leo Simon

  I'm running Linux E6520 3.2.0-56-generic #86-Ubuntu SMP Wed Oct 23 09:20:45 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux on a Dell Latitude E6530. (This is a new machine; have run the same version of linux on an older machine for a year, without this happening.) I've been losing sound regularly, though have not been able to isolate the trigger for this. I've scoured the web on this subject, in particular https://help.ubuntu.com/community/SoundTroubleshootingProcedure and Audio stopped working suddenly in 12.04 Nothing from the first site seemed to work for me. From the second site, I learned enough to be able to fix the problem when it happens, but nothing on the web has helped me figure out why the problem is happening in the first place. Patching together stuff from the web, and with some blind luck, I've found that the following steps seem to restore sound pulseaudio --kill pulseaudio --start pavucontrol -> output devices Click on the "Mute audio" icon, which mutes audio Click on the "Mute audio" icon, which unmutes audio. This obviously doesn't make sense: audio wasn't muted in the first place, but somehow, magically, toggling mute audio off and on seems to reset something. Can anybody suggest from this information why sound would be disappearing in the first place (it seems as though something is getting muted at the system level, but I don't know what)? a simpler (command-line/script) way of restoring sound, in particular, is it possible to reset pavucontrol from the commandline? Some other pieces of information that may be of use: The problem is clearly happening at the system level, since I've set up a clean new user, and this user has the same problems that I do. So user fixes like deleting the .pulse directory aren't (and don't) help. Sound works fine in Windows (dual-boot) so it's not a hardware problem Any help/suggestions on this would be most appreciated.

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• Recently reloaded computer, now have trailing effect when windows overlap

  - by Tony

  I recently did a clean install of my home machine and I am having a weird graphical error where if I move one window across the top of another it leaves a trail: I have the most recent NVIDIA drivers installed and nothing new is installed on my machine than before the reload (and I never had this issue before). I have two monitors and it happens on both so I'm sure it isn't a hardware issue (the card and my main monitor are also both less than 6 months old) I've also noticed a ripple when scrolling down on web pages which I believe is related. Any ideas what might be causing this and solutions to fix it?

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• How To Cancel Pending Windows 7 Updates

  - by Itai

  How To Cancel Pending Windows 7 Updates? The key is pending. The shutdown button has the windows update symbol meaning that there are updates that were selected to be installed which were download and will be installed upon shutdown. The only thing is that my machine will no longer boot if I let it install those updates! They are incompatible with a driver needed in the system and I did not found out until too late. The system admin used a recovery disk to get back to the previous restore point, only the updates are now pending, so I need to cancel those before the machine shutdowns next.

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• recommendation for configuration for a multi-core guestOS

  - by reidLinden

  Hi there, I've just received an upgraded Host machine, and am looking to push some of those advances to my workstations Guest OS(s). In particular, I used to have a single processor, with 2 cores, so my guestOS only had 1/1. Now, I've got a single processor with 8 cores, so I'm curious about what would be recommended for my GuestOS now? 1 processor/4 cores? 2 processors/2Cores? 4 processors/1 core? My instinct says to stick with the number of physical processors (or less), but, is that based on reality? I spent a good while looking for an answer to this, but perhaps my google-karma isn't in my favor today. Suggestions?

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• Can I run my MacBook in clamshell mode without being connected to power?

  - by kch

  Hi, At home, I run my MacBook in clamshell mode (closed lid, external display). This works fine when you're connected to the power adapter, but it doesn't work when running on battery. That's how it's supposed to be and Apple has some kb entry on the issue. But it's also lame. You can prevent the machine from sleeping when closed by running InsomniaX, but then it'll assume the builtin display is still active, so you end up with a two-display setup when you really only want the external. This is obviously less than ideal. So, is there any work around, hack, utility, black magic that I can use to make it run in clamshell mode while strictly on battery power? Also, bonus points for a solution that makes the AC status not affect the machine state at all. (Like, you know, it does normally, when not in clamshell.)

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• How can I restrict the backuppc client user as much as possible? (rsync)

  - by jxn

  I have backuppc making full backups of servers, but I'd like to be sure that my set up is as paranoid as possible. BackupPC is set up to backup via rsync, and it is set up to use a specific user on each client to be backed up. Because the backuppc client user has to have access to every file on the client machine and the ability to ssh into the machine without an interactive password, I'm a little nervous about securing the clients, and I'd like to know I haven't overlooked any options. Here's what I have in place: in the client user's authorized_keys file, i've included from="IPTOSERVER",command="/usr/bin/rsync" before the user's public key, so that the user can only login coming from the BackupPC server. Next, in the sudoers file, I've added this line: backuppc ALL=NOPASSWD: /usr/bin/rsync to allow root-level permissions only for the rsync command for that user. Are there other user, policy, or ssh restrictions that I can add while still allowing the backup pc client user to rsync all files?

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